Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

Two resistors X and Y with 2 Ω and 3 Ω resistances respectively are first connected parallelly and then in series. If voltage supplied is 5V, then:

(i) Draw the circuit diagram in order to depict the combination of resistors:

Resistance

Resistance

(ii) Estimate voltage across the 3 Ω resistor in the series combination of resistors.

Resistance of X = R₁ = 2Ω
Resistance of Y = R₂ = 3Ω
Voltage, V = 6V

In order to find the voltage across a 3Ω resistor in the series combination of resistors, we have to

We are already aware that the equivalent resistance (total resistance) in a series combination can be expressed as:

R_eq = R₁+ R₂

Now, after replacing the values of R₁ and R₂ we will get:

⇒ R_eq= 2 + 3

⇒ R_eq = 5Ω

We know that current can be expressed as:

I = V/R

Here, I = V/R_eq

So, inserting the given values, we will get:

I = 55

I = 1A

Therefore, the current passing through the circuit is 1A.

Now, in order to find the voltage present across 3Ω resistors, we can also use the formula of voltage:

V = I × R

Now, after placing the required values, we get:

⇒ V = 1 × 3

⇒ V = 3V

Hence, the voltage across the 3Ω resistor is 3 Volts.

Read More:

Resistors in Series – Important Topics
Voltage	Resistivity Temperature Dependence	Combination of Resistors
Static Electricity	Power Of Alternating Current	Derivation of Drift Velocity
Ohm’s Law and its Limitations	Difference between kva and kw	Electrical Formula
Ohm’s law	Relation between kva and kw	Internal resistance formula
Types of Current	Difference between air conditioning and refrigeration	Unit of Specific Resistance
Current density	Unit of Current	Resistor Colour Codes
Electric Dipole	Difference between AC and DC	Permittivity And Permeability
Resistance Formula	Cells, emf, Internal Resistance	Power transformers
Wheatstone Bridge	Relation between resistance and length	Electromotive Force
Current Electricity	Difference between RTD and thermocouple	Current density formula
Ampere	Differences Between Acceleration and Velocity	Types of Resistors
Carbon Resistor	Difference Between Primary Cell and Secondary Cell	Resistivity formula
Potentiometer	Current Density	Difference between emf and voltage
Conductivity	Difference between earth and neutral	Relation between power and resistance
Drift Velocity	Cells in Series and in Parallel	Uses of Resistor

CBSE CLASS XII Related Questions

1.
An astronomical telescope consists of two converging lenses. One of them of large aperture and large focal length is called objective lens and the other one, of smaller focal length and smaller aperture is called the eyepiece. It is used to see distant objects which are not seen clearly with naked eyes. The image formed by the objective lens acts as an object for the eyepiece and the final image produced by the eyepiece is magnified.

2.
In a telescope the objective has much larger aperture than the eye piece. Why ?

View Solution

3.
Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.

View Solution

4.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

View Solution

5.
Draw a labelled ray diagram of a refracting telescope when it forms image of a distant object at infinity. Derive expression for its magnifying power.

View Solution

6.
Read the following paragraph and answer the questions that follow.
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.

Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

CBSE CLASS XII Related Questions

2.
In a telescope the objective has much larger aperture than the eye piece. Why ?

4.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

5.
Draw a labelled ray diagram of a refracting telescope when it forms image of a distant object at infinity. Derive expression for its magnifying power.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

Two resistors X and Y with 2 ohm and 3 ohm resistances respectively are first connected parallelly and then in series. In both cases, voltage supplied is 5V.

CBSE CLASS XII Related Questions

2.In a telescope the objective has much larger aperture than the eye piece. Why ?

4.Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

5.Draw a labelled ray diagram of a refracting telescope when it forms image of a distant object at infinity. Derive expression for its magnifying power.

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
In a telescope the objective has much larger aperture than the eye piece. Why ?

4.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

5.
Draw a labelled ray diagram of a refracting telescope when it forms image of a distant object at infinity. Derive expression for its magnifying power.